197011631 has 4 divisors (see below), whose sum is σ = 197098200. Its totient is φ = 196925064.

The previous prime is 197011613. The next prime is 197011667. The reversal of 197011631 is 136110791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 197011631 - 2⁶ = 197011567 is a prime.

It is a super-2 number, since 2×197011631² = 77627165498560322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197011594 and 197011603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197031631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39776 + ... + 44453.

It is an arithmetic number, because the mean of its divisors is an integer number (49274550).

Almost surely, 2^197011631 is an apocalyptic number.

197011631 is a deficient number, since it is larger than the sum of its proper divisors (86569).

197011631 is an equidigital number, since it uses as much as digits as its factorization.

197011631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86568.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 197011631 is about 14036.0831787219. The cubic root of 197011631 is about 581.8762377415.

The spelling of 197011631 in words is "one hundred ninety-seven million, eleven thousand, six hundred thirty-one".